Member

I just sold my V1 phone, but the Apple store won't have any 3G's in until at least Mon. The guy I talked to at the store said I should wait until I get the new phone, sync the old phone then sync the new phone and it will erase everything on the old phone. If I don't do this, I might be left without a phone and a contract if I can't get the new one to work right away (which based on recent anecdotes, is a distinct possibility).

Is this true? It seems like lots of people have been wiping the phone before getting their new one.

Zealot

Not really. It had been shown that you can still recover info off the phone if someone really wanted to.
If you have V2, go to settings-general-reset- and use "Erase All Content and Settings". If you are not on V2, look over this article for more help.